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Yui Sze Lam, Richard Owusu-Apenten

机译:Yui Sze Lam,Richard Owusu-Apenten

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Chemoprevention using isothiocyanates is partly the result of the induction ofphase II enzymes for carcinogen detoxification from healthy cells. However,phase II enzyme activity can impair cancer therapeutic agents. The objective ofthis study was to assess phase II enzyme induction and cytotoxicity of phenethylisothiocyanate (PEITC) and glutathione conjugate with PEITC (GsPEITC) usingMCF-7 and MDA-MB-231 breast cancer cells. Changes of phase II enzymes,glutathione-S-transferase (GST) and NAD(P)H quinone reductase (QR), weremeasured by colorimetric procedures. Cell viability was determined using theMTT (3-(4,5-Dimethylthiazol-2-yl)-2,5-di-phenyltetrazolium- bromide) assay.From current results, 24hr exposure to 50 μM) of PEITC or GsPEITC increased phase IIenzyme activity by a maximum of 500-700-percent. To conclude, cytotoxic dosesof PEITC or GsPEITC possess phase II enzyme inducing activity in MCF-7 andMDA-MB-231 breast cancer cells. (225 words)
机译:使用异硫氰酸盐进行化学预防的部分原因是诱导II期酶从健康细胞中释放致癌物。然而,II期酶活性可能损害癌症治疗剂。这项研究的目的是评估使用MCF-7和MDA-MB-231乳腺癌细胞的II期酶诱导以及苯乙基异硫氰酸酯(PEITC)和谷胱甘肽偶联物与PEITC(GsPEITC)的细胞毒性。用比色法测定了Ⅱ相酶,谷胱甘肽-S-转移酶(GST)和NAD(P)H醌还原酶(QR)的变化。使用MTT(3-(4,5-二甲基噻唑-2-基)-2,5-二苯基四唑-溴化物)测定法测定细胞活力。根据目前的结果,PEITC或GsPEITC阶段II酶的暴露时间为24小时。活动最多可达到500-700%。总之,细胞毒性剂量的PEITC或GsPEITC在MCF-7和MDA-MB-231乳腺癌细胞中具有II期酶诱导活性。 (225字)

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